New Keynesian Model Research Articles

Is Numérairology the Future of Monetary Economics?

The paper discusses some fundamental problems in monetary economics associated with the determination and role of the numéraire. The issues are introduced by formalising a proposal, attributed to Eisler, to remove the zero lower bound on nominal interest rates by unbundling the numéraire and medium of exchange/means of payment functions of money. The monetary authorities manage the exchange rate between the numéraire (‘sterling’) and the means of payment (‘drachma’). The short nominal interest rate on sterling bonds can then be used to target stability for the sterling price level. The paper puts question marks behind two key bits of conventional wisdom in contemporary monetary economics. The first is the assumption that the monetary authorities define and determine the numéraire used in private transactions. The second is the proposition that price stability in terms of that numéraire is the appropriate objective of monetary policy. The paper also discusses the merits of the next step following the decoupling of the numéraire from the currency: doing away with currency altogether—the cashless economy. Because the unit of account plays such a central role in New-Keynesian models with nominal rigidities, monetary economics needs to devote more attention to numérairology—the study of the individual and collective choice processes that govern the adoption of a unit of account and its role in economic behaviour.

A No-Arbitrage Analysis of Macroeconomic Determinants of Term Structures and the Exchange Rate

We study the joint dynamics of macroeconomic variables, bond yields, and the exchange rate in an empirical two-country New-Keynesian model complemented with a no-arbitrage term structure model. With Canadian and US data, we are able to study the impact of macroeconomic shocks from both countries on their yield curves and the exchange rate. The variance decomposition of the yield level shows that US monetary policy and aggregate supply shocks explain a majority of the unconditional variations in Canadian yields. They also explain up to 50% of the variations in the expected excess holding period returns of Canadian bonds. In addition, Canadian monetary policy shocks explain more than 70% of the variations in Canadian yields over short and medium forecast horizons. It also explains around 40% of the expected excess holding period returns of Canadian bonds. Both Canadian and US macroeconomic shocks help explain the dynamics of the exchange rate and the time-varying exchange risk premium.

Debt Stabilization Bias and the Taylor Principle: Optimal Policy in a New Keynesian Model with Government Debt and Inflation Persistence

We analyse optimal monetary and fiscal policy in a New-Keynesian model with public debt and inflation persistence. Leith and Wren-Lewis (2007) have shown that optimal discretionary policy is subject to a 'debt stabilization bias' which requires debt to be returned to its pre-shock level. This finding has two important implications for optimal discretionary policy. Firstly, as Leith and Wren-Lewis have shown, optimal monetary policy in an economy with high steady-state debt cuts the interest rate in response to a cost-push shock - and therefore violates the Taylor principle. We show that this striking result is not true with high degrees of inflation persistence. Secondly, we show that optimal fiscal policy is more active under discretion than commitment at all degrees of inflation persistence and all levels of debt.

Debt Stabilization Bias and the Taylor Principle: Optimal Policy in a New Keynesian Model with Government Debt and Inflation Persistence

We analyse optimal monetary and fiscal policy in a New-Keynesian model with public debt and inflation persistence. Leith and Wren-Lewis (2007) have shown that optimal discretionary policy is subject to a 'debt stabilization bias' which requires debt to be returned to its pre-shock level. This finding has two important implications for optimal discretionary policy. Firstly, as Leith and Wren-Lewis have shown, optimal monetary policy in an economy with high steady-state debt cuts the interest rate in response to a cost-push shock - and therefore violates the Taylor principle. We show that this striking result is not true with high degrees of inflation persistence. Secondly, we show that optimal fiscal policy is more active under discretion than commitment at all degrees of inflation persistence and all levels of debt.

Robust Monetary Policy in the New-Keynesian Framework

We study the effects of model uncertainty in a simple New-Keynesian model using robust control techniques. Due to the simple model structure, we are able to find closed-form solutions for the robust control problem, analysing both instrument rules and targeting rules under different timing assumptions. In all cases but one, an increased preference for robustness makes monetary policy respond more aggressively to cost shocks but leaves the response to demand shocks unchanged. As a consequence, inflation is less volatile and output is more volatile than under the non-robust policy. Under one particular timing assumption, however, increasing the preference for robustness has no effect on the optimal targeting rule (nor on the economy).

Monetary and Fiscal Policy Interactions: Optimal Delegation and the Value of Leadership

We consider monetary and fiscal policy interactions in a New-Keynesian model of a closed economy with a government solvency constraint. We study the problem of optimal delegation in the discretionary game with two optimising policymakers and provide a welfare ranking of different leadership regimes. We find that (1) if one policymaker chooses an aggressive (smooth) policy then the other policymaker must also choose an aggressive (smooth) policy, regardless of the leadership regime; (2) an institutional design that causes any policymaker to adopt an aggressive policy generally leads to welfare losses; (3) an institutional design that causes any policymaker to adopt a history-dependent policy is welfare increasing. Specific results obtained include showing that discretionary stabilisation policy by a conservative central bank reduces welfare, and that a 'speed limit' on fiscal policy improves social welfare as the central bank chooses to smooth the interest rate in equilibrium.

Calibrating capital adjustment costs in the New-Keynesian model

We draw on the literature on dynamic factor demand equations to provide evidence for the calibration of capital adjustment costs in the New-Keynesian model. The findings support previous work which shows that for a wide range of values of the capital adjustment cost parameter, the New-Keynesian model gives plausible estimates of the degree of price stickiness.

Price-level versus inflation targeting

This paper shows that price-level targeting outperforms inflation targeting in the standard New-Keynesian model, under the assumption that the central bank is forced to operate in an environment characterized by discretion. In the benchmark case, with no persistence in the shocks, the commitment solution can be fully replicated. Intuitively, price-level targeting introduces history dependence and a stationary level of prices, both of which are prominent features of the commitment solution.

Monetary Policy and the Evolution of US economy

This paper investigates the relationship between monetary policy and the changes experienced by the US economy using a small scale New-Keynesian model. The model is estimated with Bayesian techniques and the stability of policy parameter estimates and of the transmission of policy shocks examined. The model fits well the data and produces forecasts comparable or superior to those of alternative specifications. The parameters of the policy rule, the variance and the transmission of policy shocks have been remarkably stable. The parameters of the Phillips curve and of the Euler equations are varying.

Optimal Simple Monetary Policy Rules and Non-Atomistic Wage Setters in a New-Keynesian Framework

The purpose of the paper is to design optimal monetary policy rules in a New-Keynesian model featuring the presence of non-atomistic unions. It is shown that concentrated labor markets call for more aggressive inflation stabilization. This is because the central bank is able to induce wage restraint and to push output towards Pareto efficiency by implementing tougher stabilization policies. Moreover, the welfare cost of deviation from the optimal policy is increasing in wage setting centralization. The analysis is performed in the context of a linear-quadratic approach where the welfare measure is derived resorting to a second order approximation to households’ lifetime utility. JEL Classification: E24, E52

Econometric Policy Evaluation and Inverse Control

The traditional approach to monetary policy evaluation entails a first step in which structural parameters are estimated and a second in which the performance of alternative policy rules is studied. This paper combines the two steps of the traditional approach into one by estimating a structural model subject to the restriction that the central bank chooses the policy rule that minimizes expected loss. The structure is a forward-looking New Keynesian model in which equilibrium values of output and inflation depend on expectations of future values of those variables. Analysis of U.S. data between 1965 and 2001 support the hypotheses that the sample contains two policy regimes, that the Fed placed far greater weight on stabilizing inflation after 1980, and that improvements in policy were available in both regimes. The unified approach also sharpens estimates of structural parameters.

Optimal Monetary Policy with Uncertainty About Financial Frictions

This paper studies optimal discretionary monetary policy in the presence of uncertainty about the degree of financial frictions. Changes in the degree of financial frictions are modelled as changes in parameters of a hybrid New-Keynesian model calibrated for the UK, following Bean, Larsen and Nikolov (2002). Uncertainty about the degree of financial frictions is modelled as Markov switching between regimes without and with strong financial frictions. Optimal monetary policy is determined for different scenarios of permanent and temporary regime shifts in financial frictions, as well as for variations in financial frictions over the business cycle. Optimal monetary policy is found to be state-dependent. In each state, optimal monetary policy depends on the transition probabilities between the different regimes.

New Keynesian or RBC transmission? The Effects of Fiscal Policy in Labor Markets

We study the mechanics of transmission of fiscal shocks to labor markets. We characterize a set of robust implications following government consumption, investment and employment shocks in a RBC and a New-Keynesian model and use part of them to identify shocks in the data. In line with the New-Keynesian story, shocks to government consumption and investment increase real wages and employment contemporaneously both in US aggregate and in US state data. The dynamics in response to employment shocks are mixed, but in many cases are inconsistent with the predictions of the RBC model.

Forecasting Canadian Time Series with the New-Keynesian Model

This paper documents the out-of-sample forecasting accuracy of the New Keynesian Model for Canada. We repeatedly estimate our variant of the model on a series of rolling subsamples, forecasting out-of-sample one to eight quarters ahead at each step. We then compare these forecasts to those arising from simple VARs, using econometric tests of forecasting accuracy. Our results show that the forecasting accuracy of the New Keynesian model compares favourably to that of the benchmarks, particularly as the forecasting horizon increases. These results suggest that the model can become a useful forecasting tool for Canadian time series. The principle of parsimony is invoked to explain our findings.

New Tests of the New-Keynesian Phillips Curve

Abstract Lagged dependent variables typically play an important role in empirical models of inflation. Do these lags reflect backward-looking inflation expectations, or do they proxy for rational forward-looking expectations, as in the new-Keynesian Phillips curve? Gali and Gertler [1999. Inflation dynamics: a structural econometric analysis. Journal of Monetary Economics 44, 195–222] attempt to answer this question using GMM to estimate specifications incorporating both lagged and future inflation. They report small coefficients on lagged inflation and conclude that the new-Keynesian model provides a good first approximation to inflation dynamics. We show that these tests have low power against alternative backward-looking specifications, and demonstrate that their results are also consistent with a backward-looking Phillips curve. Using an alternative approach, we find that the new-Keynesian pricing model cannot explain the importance of lagged inflation in standard inflation regressions, and find that forward-looking terms play a very limited role in explaining inflation dynamics.

Monetary and fiscal policy interactions in a micro-founded model of a monetary union

This paper analyzes in detail the mechanisms behind fiscal stabilization policy and the role of policy commitment in a micro-founded New-Keynesian model of a two-country monetary union, which is hit by supply shocks. We also explore the determinants of the gains from fiscal stabilization. While monetary policy with identical union members is concerned with stabilizing the union-wide economy, fiscal policy aims at stabilizing inflation differences and the terms of trade. Besides exploring optimal policies, we also consider monetary and fiscal rules. We study these rules both under coordination and non-coordination by the fiscal authorities.

New tests of the new-Keynesian Phillips curve

Lagged dependent variables typically play an important role in empirical models of inflation. Do these lags reflect backward-looking inflation expectations, or do they proxy for rational forward-looking expectations, as in the new-Keynesian Phillips curve? Galí and Gertler [1999. Inflation dynamics: a structural econometric analysis. Journal of Monetary Economics 44, 195–222] attempt to answer this question using GMM to estimate specifications incorporating both lagged and future inflation. They report small coefficients on lagged inflation and conclude that the new-Keynesian model provides a good first approximation to inflation dynamics. We show that these tests have low power against alternative backward-looking specifications, and demonstrate that their results are also consistent with a backward-looking Phillips curve. Using an alternative approach, we find that the new-Keynesian pricing model cannot explain the importance of lagged inflation in standard inflation regressions, and find that forward-looking terms play a very limited role in explaining inflation dynamics.

Macroeconomic Linera Factor Model of Interest Rate Term Structure

The work develops a macroeconomic factor term structure model of interest rate in which the state-variables dynamics is given by the reduced form of a new-keynesian structural model for a small open economy, like the Brazilian one. The model is used to identify the macroeconomic determinants of the Brazilian term structure after the introduction of the inflation target regime.

Robust Monetary Policy in a Small Open Economy

This paper studies how a central bank's preference for robustness against model misspecification affects the design of monetary policy in a New-Keynesian model of a small open economy. Due to the simple model structure, we are able to solve analytically for the optimal robust policy rule, and we separately analyze the effects of robustness against misspecification concerning the determination of inflation, output and the exchange rate. We show that an increased central bank preference for robustness makes monetary policy respond more aggressively or more cautiously to shocks, depending on the type of shock and the source of misspecification.

New perspectives on capital, sticky prices, and the Taylor principle

Our main result is that dynamic new-Keynesian (DNK) models with firm-specific capital feature a substantial amount of endogenous price stickiness. We use this insight to assess the desirability of alternative interest rate rules, and make the case for combining active monetary policy with interest rate smoothing and/or some responsiveness of the nominal interest rate to real economic activity. The key mechanism behind our results is also useful from a positive point of view: the feature of firm-specific capital increases the empirical appealingness of DNK models, as documented by a growing body of literature.